Prisoner Upa is scheduled to fight guard Samon Gokuu, but Rock teases him into a match first. Samon easily beats Rock and the other prisoners are impressed. Guard Inori Hakkai takes over prisoner supervision from Samon with his new assistant Houzuki Sanzou. The warden is summoned to police headquarters with requested information on inmates 15 and 634 (Jyugo and Musashi), leaving the supervisors in charge. Supervisor Mao Nimaijita starts to taunt Samon about his brother Enki Gokuu, the former supervisor of Building 5 who betrayed the guards and killed an inmate. Samon then has a visit from a woman Noriko who inquires about her brother Houzuki Sanzou and Samon's brother Enki. Meanwhile as Jyugo wanders the corridors, out of his cell again, Rock appears, and with a vacant expression on his face immediately attacks Jyugo.